JP3932240B2 - Display method of direction of compass in computer plane survey system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for displaying a direction of a magnetic stylus in a computer plane surveying system using a measuring instrument such as a total station or transit.
[0002]
[Prior art]
When creating a survey drawing with a computer planer surveying system, an angle at which the north direction symbol is displayed on the drawing and a method of plane surveying with a conventional computer planer surveying system will be described.
In the computer plane survey system, a total station that can measure the angle and the distance at the same time has been used in recent years.
In order to display the surveyed observation points, a personal computer and CAD software which is display software are used. The angle measurement value and distance measurement value of the observation point measured by the total station are immediately displayed on the CAD on the personal computer by communication.
Details of the computer plane survey system will be described with reference to FIG. First, the association between the 0 degree direction of the total station and the 0 degree direction of the CAD software will be described. At the plane surveying site, the surveying reference direction 3 is collimated by the total station 1 and the angle measurement value of the total station 1 is adjusted by 0 degree. (The angle measurement value display of the total station 1 indicates the angle value from the reference direction 3.) On the other hand, the total station position 11 and the reference direction 7 are also determined by CAD on the personal computer 6. The reference direction 7 on the CAD can be freely determined on the screen, but it is convenient to display the horizontal in the reference direction as shown in FIG. Thus, even if the reference direction on the CAD is horizontal, the relative positional relationship of the observation point with respect to the reference direction is maintained at the same angle both on the spot and on the CAD. This completes the association in the 0 degree direction, and the observation point can be surveyed. If you surveying observation point X by the total station 1 in the field, measured angle values of the collimating direction 4 viewed becomes A _X. On screen display of the personal computer 6 can be displayed on the screen observation point X by a collimating direction 10 an angle A _X from the reference direction 7 of the screen. Since then, angle measurement and distance measurement have been repeated for each observation point, and computer plane surveying has been carried out by sequentially displaying the observation points on the screen.
Furthermore, to complete a flat survey drawing, after surveying all the observation points at the site, take it back to the office, etc., and complete the drawing through drawing and tracing in the internal work (indoor work in a company building, etc.). The screen display of the north direction symbol is drawn at the time of this trace. FIG. 3 shows a drawing at the time when all the observation points on the site are surveyed, and FIG. 4 shows a drawing at the time when the trace is completed.
[0003]
To draw a north-direction symbol at the time of tracing, it is necessary to determine the arrangement position and direction of the symbol. With regard to the placement position, the trace operator arranges it appropriately by looking at the balance on the drawing. However, with respect to the direction, since the alignment with the surveying site must be maintained, conventionally, the following two methods have been taken. .
The first shows the north direction in the field book created at the survey site. What can be easily displayed on the CAD at the surveying site is limited to the observation point 12, the total station position 11 and the reference direction 7 as shown in FIG. 3, so information such as the positional relationship of the observation points, attributes and notes are recorded. To create a field book to do. The north direction is also recorded on this field book. At the time of tracing, the position of the observation point indicated in the field book and the positional relationship in the north direction are read to determine the angle value. In FIG. 5, the utility pole 14 is on the direction indicated by the azimuth magnetic needle with respect to the manhole 13, so this direction is recorded in the field book as the north direction.
Second, at the surveying site, nothing is done with respect to the north direction, and at the time of tracing, the angle is obtained from that part of the commercial map as shown in FIG. In FIG. 6, the angle about _AK is obtained from the road direction at the entrance of the site in the circle and the north direction of the map.
[0004]
[Problems to be solved by the invention]
However, in the above first method, the field book is not intended to accurately draw the direction, and the field book is created on site, so there are many errors in the positional relationship due to creation time constraints etc. It can be said. As shown in FIG. 7, the electric pole 17 in the middle of the line connecting the reference manhole 13 and the electric pole 14 as the mark of the north direction is recorded on the line in the field book, whereas on the trace, There is an error on the right side of the line. Furthermore, there may be individual differences in the judgment of the north direction angle due to the difference between the field book and the internal business trace drawing.
In the second method, since a commercially available map is used, most of the scales are coarser than 1 / 25,000 as shown in FIG. For this reason, accuracy is not obtained at about 1/250, which is the target of plane surveying as shown in FIG. 4, and many errors are included. There are about 1/250 of special maps, but if you purchase them for each survey site, it will cost a lot of money, and if the update period of the map does not match the survey time, the map at the time of conducting the field survey will be displayed. It is possible that it is not available. In addition, even if the site exists on a purchased map, it cannot be used if it is old, and it is necessary to purchase again, resulting in a great expense.
Therefore, the present invention has a configuration of only the equipment used so far, has easy operability, minimizes errors and enables checking at the initial stage of the process, eliminates individual differences, and is a field book. Another object of the present invention is to provide an inexpensive method for displaying a direction of a magnetic needle in a computer plane survey system that does not require other materials such as a market map.
[0005]
[Means for Solving the Problems]
In the display method of the compass direction in a computer plane surveying system communication connection with the personal computer total station, launch a program on a personal computer in conjunction with CAD software and total station on a personal computer, to collimate the total station surveying reference direction, it and zero degrees direction total station, on the screen of the CAD computer, orient facing the total station to a reference direction on the CAD screen, a command to display a north direction symbol on the CAD screen is given, the CAD software When a north direction angle measurement request is issued to the total station and the north direction indicated by the compass is measured by the total station, the angle value is communicated to the personal computer , and the CAD software determines the angle value _Ak and the angle of the reference direction on the CAD screen. A ₀ Adding and paste north direction symbol on the CAD screen position is indicated in the CAD software, by an angle A _k0 described above adds to rotate the north direction symbol, north direction symbols the rotated into its designated position It is attached, characterized in that it is displayed. By doing in this way, the north direction symbol with few errors can be displayed with the observation point display at the surveying site with an easy operation.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An example of an embodiment of the present invention will be described below.
First, a program processing flow of software for displaying a north direction symbol will be described with reference to FIG. Note that the association between the 0 degree direction of the total station and the 0 degree direction on the CAD and the surveying of observation points are the same as those in the prior art, and the description thereof is omitted. Here, a description will be given of a program processing flow for the software of the portion displaying the north direction symbol related to the present invention.
1. The activation of north direction symbol display is accepted by mouse click on the PC screen.
2. Immediately after the activation is accepted, an angle measurement request is sent to the total station.
3. The program enters a standby state for receiving an angle value from the total station.
The total station performs angle measurement in the current collimation direction, and communicates the angle value as soon as the measurement is completed.
4). Receives the angle value from the total station and cancels the standby state.
5). The position to display the north direction symbol is accepted by clicking the mouse.
6). Calculate the display angle of the north direction symbol.
If the angle value received here is rotated so that the north direction symbol points to the north direction as it is, the angle is expressed using the 3 o'clock direction (horizontal direction) which is the reference direction of CAD as the reference (0 degree). The following calculation is required.
Usually, the CAD angle system is a CAD angle with reference to the 3 o'clock direction of the watch.
If the this order relative to the horizontal angle of 0 ° of the system to be set initially, the angle value A _K from the total station as follows, was added horizontal angle of 0 ° A ₀ of a system with 3 o'clock relative to the direction The value is the symbol angle _AK0 . By this calculation, the rotation angle of the symbol in accordance with the CAD angle system is obtained.
A _K0 = A _K + A ₀
7). The north direction symbol is placed at the position where the mouse was clicked, rotated by the calculated angle, and displayed on the screen.
Next, the operation of the human system and the system operation at that time for displaying the north direction symbol on the screen will be described.
The equipment to be used is configured by adding only a compass to a general computer plane survey system described in the prior art. The software that displays the north direction symbol uses a CAD program. The compass is displayed on the rotation axis of the total station as shown in FIG.
As described in the prior art with reference to FIG. 2, the setting of the horizontal angle 0 degree direction of the total station, the setting of the horizontal angle 0 degree direction on the CAD, and the association between the 0 degree direction of the total station and the 0 degree direction on the CAD I do. At the plane surveying site, the surveying reference direction 3 is collimated by the total station 1 and the angle measurement value of the total station 1 is adjusted by 0 degree. (The angle measurement value display of the total station 1 indicates the angle value from the reference direction 3.) On the other hand, the total station position 11 and the reference direction 7 are also determined by CAD on the personal computer 6. This completes the association in the 0 degree direction. After associating with the 0 degree direction, the observation point is surveyed. If the observation point X and surveying by total station 1 in the field, viewing angle measurement value A _X of the collimating direction 4, screen observation points by an angle A _X from the reference direction 7 of the screen on the screen display of the personal computer 6 Can be displayed. Thereafter, angle measurement and distance measurement are repeated for each observation point, and the observation points are sequentially displayed on the screen.
The survey so far is no different from the general computer planer survey system described in the prior art, and only a difference occurs when displaying the azimuth direction, and software for displaying the north direction symbol is started. Hereinafter, the display of the azimuth direction will be described with reference to FIG.
11. The collimation direction 4 of the total station 1 is aligned with the azimuth magnetic needle 2.
12 In order to activate the software for displaying the north direction symbol, a north direction symbol display button provided on the personal computer 6 is pressed.
13. The position (symbol base point) for displaying the north direction symbol 9 on the CAD is designated by a human system such as a mouse click.
14 An angle measurement request is made to the total station 1 by CAD.
15. The total station 1 measures the angle in the current collimation direction and immediately communicates the angle measurement value. Hakakakuchi is the _{A K.}
16. CAD on the PC 3 receives the Hakakakuchi _{A K,} computes the symbol angle to fit the CAD angle system. In the case of FIG. 1, since the reference direction 7 is the 3 o'clock direction, A ₀ is 0 [°]. Therefore, A _K0 = A _K
17. The CAD displays the north direction symbol 9 on the screen with the specified position as the symbol base point 8 and the calculated symbol angle _AK0 as the rotation angle.
From the above results, it is possible to easily display the north direction symbol on the screen by adding the equipment configuration and the simple software to which a directional magnetic needle is added to a general computer plane surveying system.
[0007]
【The invention's effect】
As described above, according to the present invention, it is possible to display a north direction symbol with few errors and individual differences by an easy operation without requiring special equipment other than the computer surveying system normally used. By systematization, it is possible to prevent forgetting to record the field book related to the direction, which is extremely effective for practical use.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram illustrating an embodiment of a method for displaying a direction of a magnetic needle in a computer plane survey system of the present invention.
FIG. 2 is a conceptual diagram illustrating an example of a method of displaying a direction of a magnetic needle in a conventional computer plane surveying system.
FIG. 3 is a drawing of only observation points created at a surveying site.
FIG. 4 is a plane survey map created by tracing a drawing of only observation points created at a survey site.
FIG. 5 is an example of a field book created on site.
FIG. 6 is an example of a commercially available map.
FIG. 7 is a diagram showing an error between a field book and a plane survey map.
FIG. 8 is a program processing flowchart when the present invention is implemented by software.
[Explanation of symbols]
1 Total Station 2 Azimuth Magnetic Needle 3 Reference Direction 4 Collimation Direction 5 Communication Cable 6 PC 7 Reference Direction 8 Symbol Base Point 9 North Direction Symbol 10 Collimation Direction 11 Total Station Position 12 Observation Point 13 Reference Manhole 14 North Mark Utility pole 15 Line connecting the manhole and utility pole 16 Utility pole on the right side of the line 17 Utility pole on the line segment (originally on the right side of the line)

Claims (1)

In the display method of the compass direction in a computer plane surveying system communication connection with the personal computer total station, launch a program on a personal computer in conjunction with CAD software and total station on a personal computer, to collimate the total station surveying reference direction, it and zero degrees direction total station, on the screen of the CAD computer, orient facing the total station to a reference direction on the CAD screen, a command to display a north direction symbol on the CAD screen is given, the CAD software When a north direction angle measurement request is issued to the total station and the north direction indicated by the compass is measured by the total station, the angle value is communicated to the personal computer , and the CAD software determines the angle value _Ak and the angle of the reference direction on the CAD screen. A ₀ Adding and paste north direction symbol on the CAD screen position is indicated in the CAD software, by an angle A _k0 described above adds to rotate the north direction symbol, north direction symbols the rotated into its designated position is attached, characterized in that it is displayed, the display method of the compass direction in a computer plane surveying system.

Images